Steam-boiler



(No Model.) A

' C. M. GIDDINGS.

STEAM BOILER.

A Harney UNITED STATES vPATENT OFFICE.

CHARLES M. GIDDINGS, OF MASSILLON, OHIO.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 321,015, dated June 30,1885.

VApplication filed April 2, i885. (No model.)

o all whom/ it may concern:

Be it known that l, CHARLES M. GIDDINGs, of Massillon, in the county ofStark and State of Ohio, have invented certain new and usefulImprovements in Steam-Boilers; and I do hereby declare the following t0be a full, clear, and exact description of the invention, such as willenable others skilled in the art t0 which it pertains to make and usethe same.

My invention relates to improvements in steam-boilers of that class thathave crownsheets, and that are used for marine purposes ortraction-engines, having for its object a water-retaining boX locatedabove and connected with the crown-sheet, to the end that with theforward end of the boiler inclined downward a sufficient quantity ofwater will be retained above the crown-sheet toprotect the latter frombeing overheated and the safety-plug from being melted. `With thisobject inview my invention consists in certain features of constructionand in combination of parts, hereinafter described, and pointed out inthe claims.

In the accompanying drawings, Figures l and 2 are elevations in sectionof a portion of a boiler, showing` my improved device attached, theformerv showing the boiler in its normal position, and the lattershowing the boiler with its forward end depressed. Fig. 3 isa plan viewof the crown-sheet and water-retaining box.

A represents the shell of the boiler; B, the crown-sheet, and O the endor head of the boiler.

E represents the water-retaining box, con sisting of the plates a, b,and c, secured to each other and to the crownsheet, making tight joints.These three plates of course might be integral and bent at the corners.

F represents the water-line. Vith the boiler in its normal position, asshown in Fig. 1, the water-retaining box is inoperative.

When the forward end of the boiler is depressed, as would be the casewith a tractionengine going down hill, the water in the boiler ifunobstructed would gravitate to the forward end, leaving the crown-sheetexposed, and if the hill were of considerable length the safety-plug Gwould be likely to be melted out; or in the absence of a safety-plug thecrownsheet would be liable to become overheated and injured.

With my device attached the water is retained above the crownsheet, asshown in Fig. 2, and hills of any length may be descended in safety. Ingoing uphill the head C serves the same purpose, and the rear end of theboiler would be flooded.

That I claim isl. The combination, with a boiler, of a water-box open atthe rear end and at the top and rigidly secured to the upper surface ofthe crown-sheet.

2. The combination, with a boiler, of the water-retaining boX,consisting, essentially, of two side sections and one end sectionrigidly secured to each other and to the upper surface of thecrown-sheet, substantially as set forth.

In testimony whereof I sign this specification, in the presence of twowitnesses, this 6th day of March, 1885.

CHARLES M. GIDDINGS.

-\lVitnesses:

GEORGE HANsoN, ERNEST KIMMEL.

